Kee-Meng Tan, one of the most senior European executives at Knight Capital, which merged with Getco last year to form KCG Holdings, has left the group, according to a person familiar with the situation.

Last Friday, a note was sent internally that said Tan was leaving KCG to pursue other interests, the person said.

Following Knight’s $1.4 billion merger with high-speed trading firm Getco last July, Tan had taken on a strategy and product development role with KCG in London.

He first joined Knight Capital in March 2010 as head of its European electronic trading group, with responsibility for its Knight Link dark pool. He also oversaw Knight’s strategic investment in European retail stock exchange Equiduct.

A number of staff from Knight and Getco’s former European businesses have left KCG since the merger. The group’s chief executive Daniel Coleman told Financial News last week that KCG had undertaken a “reasonably significant” reduction in its European workforce last October. Among those to leave were Robert Smith, formerly head of Getco’s European business.

Getco was one of five firms that rescued Knight from collapse after a rogue trading algorithm in August 2012 cost the broker more than $450 milllion within minutes.

KCG’s executives are steering the firm away from Getco’s high-speed proprietary trading roots and building on Knight’s institutional and retail wholesaling business.